I went as far as building code in PRs and reusing those blobs when the code gets merged in into main. I find it super weird that in many projects the code gets

I went as far as building code in PRs and reusing those blobs when the code gets merged in into main. I find it super weird that in many projects the code gets rebuild and packaged on merge to main, and when released, all while a lot of underlying processes aren't locked. apt install xyz can be different. a python requirements.txt as well. (which is why we use Poetry).